Steam-boiler



(No Modell.)

H. S. PBLL. STEAMBOILER.

No. 5'7 1 ,282 P atente d N `o V. l 0, .1 896u v will {llllirllllllulll u" Hmmm m,

UNITED STA/TESx PATENT dFrio-r..

HARRY S. PELL, OF AKRON, OHIO, ASSIGNOR TO THE STIRLING COMPANY, OF CHICAGO, ILLINOIS.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 571,282, dated November 10, 1896. Application led December 22, 1893. Serial No. 494,404. (No model.)

To all whom t may concern:

Be it known that I, HARRY S. PELL, a citizen of the United States, residing at Akron, Ohio, have invented certain new and useful Improvements in Steam-Boilers, of which the following is a specification.

The object of my invention has more par* ticular reference to tubular steam-boilers of the general type shown and described in the ro Stirling patent, No. 47 9,678, issued July 26,

1892; and my invention consists in the features and combinations hereinafter described and claimed.

The drawing represents a transverse vertical section of my improved tubular boiler. In making my improved steam-boiler I make a fire-chamber A of the desired size and cover it with an arch a. I arrange water and steam drums B and B and B2 in the upper part of the boiler and connect the first two of them with water-pipes b and steampipes b', which steam-pipes are also used to connect the last two of the drums mentioned. I arrange in the lower part of the boiler a drum C, which is intended to be connected with and suspended from the three upper drums mentioned by a series of tubes c, so as to afford communication between them. Deflecting-plates c' and c/ are arranged behind the series of tubes connecting the drum C and the drums B and B', so as to deflect the heat and products of combustion upward through the one series of tubes and down through the other, as indicated by arrows, in order to expose as great a portion of their length as practicable to the heat. Up to this point I have simply described in general terms the construction Vshown in the Stirling patent referred to, and reference may be had to such patent for a more minute and detailed description of the construction and operation of the parts. While using these parts which are found in the Stirling construction, I do not in all cases, however, lead the heat and products of combustion directly from the last series of tubes up and out through the smokestack; but I prefer to arrange a wall or deliecting-plate D at the back of the last series of tubes. If a wall is used, as shown in the drawing, I provide it with an opening CZ in its upper portion, through which the heat and products of combustion are drawn, so as to come into contact with another series of tubes E, which connect a lower drum F and an upper drum G, so as to afford communication between them. This upper drum is connected with the drum B2 by pipes b', while the lower drum is connected by a pipefto a source of water supply. It is also provided with a blow-off pipe f'. The series of tubes E has arranged bell-ind it a deIiecting-plate e, so as to cause the heat and products of combustion after coming into contact with such tubes near their top to pass down through them before entering the iiue II, which leads to the smoke-stack.

In operation the water supply to the boiler enters from the source of supply through the pipe f into the lower drum F. It is intended that the sediment which may be contained in the water will to a certain extent be precipitated and caught in this drum. The water passes up through the series of tubes E intothe water-drum G. This drum is preferably arranged on a somewhat lower plane than the steam and water drums, so that it will be constantly kept lled with water. It may also be supplied with a valve (not shown) to permit the escape of any air that may get in. The water passes from the drum G through the water-pipes b into the steam and water drum B2. This drum has communication through the pipe b with the steam-space of the drum B', so that its upper portion will be kept filled with steam, thus exerting a pressure on the water to facilitate its feeding. The water from the drum B2 passes through the series of tubes connecting it with the lower drum C, whence it passes up through the series of pipes connecting the drum C with the steam and water drums B and B'. Through means of the water communication b a circulation is maintained through these drums and their connecting series of tubes.

What I regard as new, and desire to secure by Letters Patent, is-

l. In a water-tube boiler, the combination of a lower feed-drum communicating with a source of water supply, a rear elevated drum, pipes connecting the feed-drum with the rear elevated drum, a middle elevated drum, pipes connecting the rear and middle elevated IOO drums, a lower mud-drum, pipes connecting,` the middle elevated drum with the mud-drum, a front elevated drum or drums, pipes connecting` the mud-drum with the front elevated drum or drums, and means for drawing off steam from the middle and front elevated drums, whereby water may be introduced into the lower feed-drum, carried up to the rear elevated drum, across to the middle elevated drum, down to the mud-drum, and up to the front elevated drum or drums, substantially as described.

2. In a water-tube boiler, the combination of three elevated steam and water drums, B and B and B2, a lower drum, C, series of lower feed-water drum, substantially as described.

HARRY S. PELL. Vitnesses:

C. P. HANSEN, A. R. HENRY. 

